Milling machine



L. F. NENNINGER MILLING MACHINE Jan. 5, 1932.

Filed Aug. 5, 1927 Patented Jan. 5, 1932 UNITED STATES PATENT OFFICELESTER F. N EN N INGER, 0F CINCINNATI, OHIO, ASSIGNOR TO THE CINCINNATIMILLING MACHINE COMPANY, OF CINCINNATI, OHIO, A CORPORATION OF OHIOMILLING MACHINE Application led August 5, 1927. Serial No. 210,867.

This invention relates to improvements in milling machines or likemachine tools and has particular reference to the frame structurethereof.

In the operation of milling machines or the like for quantity productionconsiderable diiiiculty is frequently experienced due to piling up ofthe removed chips and the making of proper disposition of these so thewill not clutter up the floor, interfere witi proper loading and removalvof the work or operation thereof and at the same time so that the chipspermit of vtheir being readily collected.

Also, the presence of the piled chips on the tabletends to cause unduesplashing or spreading of the coolant and involves diiiiculties in theproper leading of the coolant back into the cooling pan on the machinefor reutilization. v

It is therefore the purpose of the present invention to provide animproved machine tool structure which shall satisfactorily take care ofand substantially automatically collect the chips and prevent theirbeing spread over the floor and about the machine.

'A further object of the invention is the provision of improvedstructure which will most satisfactorily care for the coolant andcollect the same with minimum of splashing, thus keeping the machine asan entirety and the ioor therearound in a more clean, healthy andsanitary condition.

Other objects and advantages of the present invention should be readilyapparent by reference to the following specication taken in connectionwith the accompanying drawings, and it will be understood that I maymake any modifications in the specific structural details hereinafterdisclosed within the scope of the appended claims, without departingfrom or exceeding the spirit of the invention. v

Figure 1 is a side elevation of a milling machine embodying theseimprovements.

Figure 2 is a plan view of the front portion of the bed and table, and

Figure 3 is a vertical section as on line 3-3 of Figure 2.

In the drawings the numeral 10 designates the main bed portion of a.milling machine having secured thereto the column 11 supporting thespindle 12 for arbor 13 bearing the milling cutter 14.

As will be best understood by reference to Figure 3 the bed 10 in placeof being substantially solid is in the form of a hollow shell providinga large interior chamber as at 15 and a second subtending smallerchamber 16. Projecting inwardly of the bed intermediate these chambersis the flange 17 which provides a support for the removable screenmember 18. Below the flange 17 the bed is further formed with theinterior rib 19 forming a sliding support for the peripheral iange 20 ofthe coolant pan 21.

As is shown in Figures 2 and 3 the bed is substantially open at the topthroughout its length except for the transverse ribs 22 disposed at aplurality of points and serving as bridge truss members both bracing thebed and supporting the longitudinal plate or casting 23, providing theWays 24 for,I the longitudinally shiftable work supporting table 25.This table 25 it will be noted has at one end the trough portion 26having a discharge end or return 27 which extends back over the openspace 28 of the interior of the bed at its limit of movement as shown inFigure 2, so that coolantand chips from the table will at all times bedischarged into said 4open space.

From the foregoing description the general structural features of thepresent invention should be readily apparent and it will be noted thatthere has been provided at the upper part of the bed of the machine, inplace of a solid topa skeleton framework or support constitutingguideways for the Work supporting table having at each side `thereofcompletely open coolant and chip receiving spaces through which bothcoolant and chips may drop into the interior of the machine and whoseentrances are so large as to absolutely prevent any possibility ofclogging, interfering with the passage of either the solid or liquidmaterial.`

It will further be noted that by this construction the bed itself formsthe containing chamber for separation of the solid and liquid matter, inwhich a large receiving chamber is rovided for the chips or soli matterwhic build up and increase in volume and at the same time a smaller butsui- 6 ciently large chamber to receive the return coolant which mayconsequently be readily reutilized.'

In order that all of the cltigs and the coolant may be roperly direcinto the inte- 10 rior of the bed, use is preferably made of lateralguide members 29 either integral with the bed or auxiliary membersremovabl secured thereto and extending u ward a ove the top of thetable. With suc a structure l5 the workman may easily brush the table,all

rticles carried over to the side, dropping own into the bed and beiseparated rom the coolant by the interme ate screen member 18.

To facilitate removal of the chips 30 there is Apreferably provided inone end of the bed a cleaning aperture 31 while the bed is also formedwith a second aperture or guideway 32 through which the coolant pan 21may be removed when desired.

It will further be'noted that by the removable supporting of the screen`18 the chips therefrom may be thus withdrawn through aperture 31 or thescreen itself may be taken out through said aperture for suitablecleaningewhenever there may be tendency of same to come clogged.

1. As an article of manufacture, a milling machine bed castingcomprising a hollow shell having enclosing side and end walls,transverse truss ribs integral with and connecting said side walls, alongitudinally ex' tending skeleton frame member integral 40 with andcentrally connecting said ribs said member having table engaging waysformed on the u per face thereo substantially as and for t e purposedescribed, said integral casting havin additionally inwardly extendingrib or ange portions formin a partial lower closure for the enclosed camber of the bed casting and adapted to support a member for rece tionof discharge from the machine table wiien in use.

2. A bed unit for a milling machine or the like comprising a hollowrectangular shell having joined end and side walls providing an interiorchamber, a coolant reservoir forming a closure for the bottom of thechamber, a erforated chip receiver superimposed on sai reservoir, spacedtransverse ribs connected to the side walls at the u per portion whereofto laterally brace the wa ls and form large chip and coolant passagesbetween the same, a frame member of less width than the bed extendinglon 'tudinally thereof and sup orted by the ri s, guideways formed onsai member and a table slidably mounted on said guideways, said tablebeing of substan- 5 tially the same width as said member whereby chipsand coolant may fall by gravity therefrom directly through said passa esto the receivers in the bottom of the b 3. A machine tool having a bedcom rising inte ally connected end and side wa ls one of t e wallshaving an attachment surface formed thereon, a column mounted adjacentthe bed and attached to said surface, spaced ribs integrally connectedbetween the side walls for bracing the same a frame mounted in the topof the bed and extending transversel space relation to the side wallsforming a series of longitudinal openings between each side of the frameand the adjacent side walls, a table reciplrocably mounted on saidframe, means to 'vide the interior of said bed into a large and smallchamber in superimosed relation to one another, achip receiver ormed inthe bottom of the large chamber and a coolant receiver mounted in thesmall chamber, whereby chips and coolant will fall directly from thesaid table through said opening and be collected and separated by saidreceivers.

4. A machine tool having a bed com rising integrally connected end andside wa ls, one of said walls having an attachment surface formedthereon, ay column mounted adjacent to the bed and attached to saidsurface, spaced ribs and extending transversely thereof andsubstantially parallel to but integrally connected between the sidewalls for bracing the same, a frame mounted in the top of the bed onsaid ribs in spaced relation to the side walls to form a longitudinalseries of o nings between each slde of the frame an the adjacent sidewall, longitudinal guidewa s formed on the frame, a table reciprocab ymounted on said guideways, an internal flange projecting from said wallsof said bed dividin the interior thereof into upper and lower c vembers,a chip receiver supported by said flange whereby chips will be collectedin said upper chamber, an internal rib roj ecting from the walls of saidlower chamer, a coolant reservoir supported on said rib, one of said endwalls having an o ening therein whereby chips may be remove from theupper chamber during the operation of the machine.

5. A machine tool having a bed comprising integrally connected end andside Walls formin a rectangular interior chamber, one of sald wallshaving an attachment surface formed thereon, a column mounted on saidbed and attached to said surface, spaced ribs having inclined uppersurfaces integrally connected between the side walls for bracing thesame, a frame mounted in the top of said bed and extendingtransversely'of and su ported b said ribs in spaced relation to the sidewal s to form a longitudinal series of o enin between each side of theframe and t e adjacent side wall, longitudinal guideof and supported bysaid ribs in ways formed on the frame, a table reciprocably mounted onthe guideways a trough portion formed at the end of the table having areturn overlying the bed to discharge into one of said openings, aninternal flange projecting from the side walls of said bed dividing theinterior thereof into upper and lower chambers, a chip receiversupported by said flange, whereby chips will be collected in said upperchamber,fan internal rib projecting from the Wall of said lower chamber,and a coolant reservoir supported on one of said ribs, said end Wallshaving openings whereby the chips may be removed during operation of themachine.

In testimon whereof I aix my signature.

L STER F. NENNINGER.

